WASHINGTON, June 28.-The Nixon Administration reaffirmed today that it intended to provide economic aid to Pakistan despite international pressures to halt foreign assistance until the central Government reached a political accommodation with East Pakistan.

Most of the 11 nations forming the Aid to Pakistan Consortium have concluded that assistance, running at about $500-million a year, should be withheld pending a political settlement of the crisis that has resulted in the death of an estimated 200,000 East Pakistanis and the flight to India of about six million refugees.

The World Bank, which coordinates assistance to Pakistan. has recommended against further aid. Britain, Canada and Belgium, among other members of the consortium, have taken a similar stance.

Their positions emerged at an informal meeting of the consortium held in Paris last Monday to receive the report of a World Bank mission that toured Pakistan. Robert S. McNamara, the president of the bank, was reported to have approved this policy last Thursday .

Administration officials reported at Senate hearings today that the United States said in Paris that it disapproved of the policy of denying economic aid to Pakistan as a political instrument of pressure. This view was reaffirmed here today.

Testifying today before the Senate Judiciary Subcommittee on Refugees, the Deputy Assistant Secretary of State for Near Eastern and South Asian Affairs, Christopher Van Hollen, said that by providing economic aid the United States would have leverage in persuading President Yahya Khan to seek a "political accommodation" in East Pakistan on the basis of autonomy and to create conditions allowing the refugees to return.

He admitted, however, that such "leverage" was not yet measurable and that few refugees hack returned home. Mr. Van Hollen also announced that the Administration had no plans for placing a full embargo on shipments of military equipment to Pakistan.

He told the subcommittee, headed by Senator Edward M. Kennedy, Democrat of Massachusetts, that it was "likely that additional military equipment will be shipped to Pakistan."

He explained that while the Administration had halted the granting of export licenses for military items under its four-year old program of credit and cash sales after the outbreak of hostilities in East Pakistan last March 25, the permits issued before that date would not be revoked.

Other Administration sources had reported, however, that this decision was made only last week by the National Security Council after newspaper disclosures showed that at least three Pakistani ships carried military equipment from New York to Karachi despite what the State Department had originally described as a ban on all shipments.

KENNEDY PROTESTS

The State Department later issued a clarification, saying that the ban did not apply to equipment purchased by the Pakistanis before March. Under questioning by Senator Kennedy, Mr. Van Hollen conceded that the State Department's earlier public statements on the matter were "confusing" and "misleading."

Later in the day, State Department officials confirmed reports that the Pakistani freighter Kaptai, due in New York today, would sail for Karachi about July 2, "presumably with items on the munitions control list," and that between four and five other ships would sail with similar cargos before mid-August.

This information led Senator Kennedy late in the afternoon to telephone Joseph F. Sisco, Assistant Secretary of State for Near Eastern and South Asian Affairs, to protest the near shipments.

Mr. Kennedy then issued a statement charging that the hearings before his subcommittee this morning had indicated that the Administration's policy on military supplies to Pakistan was "misleading and contradictory." "In violation of the understanding conveyed to me and others in Congress, our Government has freely tolerated at least three shipments of military equipment to Pakistan over the past two months," he said.

"Today, after the hearings, we learned that still another ship, the Kaptai, is docking in New York to be loaded with still more military hardware for Pakistan and four to five more ships are expected to be loaded ire the coming weeks.

"I've asked the Administration to stop the policy of shipping arms to Pakistan."

At the subcommittee hearing, Mr. Van Hollen justified the decision to continue economic aid to Pakistan and to maintain the validity of the military export licenses on the ground that to do otherwise in a situation of "civil strife" in East Pakistan would "be seen as sanctions and intrusion in internal problems."

He said that the United States had decided to keep selling "non-lethal" military items to Pakistan so that President Agha Mohammad Yahya Khan would not turn to other sources of supply, such as Communist China.

He acknowledged, however, that China had been supplying arms to Pakistan all along.